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Metrology device with programmable smart card

  • US 6,591,229 B1
  • Filed: 10/09/1998
  • Issued: 07/08/2003
  • Est. Priority Date: 10/09/1998
  • Status: Expired due to Fees
First Claim
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1. A utility metrology device, comprising:

  • a metrology unit for metering usage of a commodity selected from the set having the members electricity, gas, and water;

    a control circuit connected to the metrology unit;

    a smart card interface connected to the control circuit, wherein the control circuit is configured to;

    i) communicate with a programmable smart card through the smart card interface;

    ii) send commands to the programmable smart card;

    iii) select an application to be run on the programmable smart card;

    iv) instruct said application to perform a specific task;

    v) execute a command from the programmable smart card; and

    vi) perform the appropriate service corresponding to said command from the programmable smart card; and

    a meter operating system that controls the operation of the utility metrology device, said meter operating system being isolated from a smart card operating system.

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